Which system of government rests furthest left on the political spectrum and as a totalitarian regime focuses on the government owning all aspects of the economy including property and the means of pr?

The system of government that rests furthest left on the political spectrum is communism. In a totalitarian regime, communism advocates for the government to own all aspects of the economy, including property and the means of production, effectively eliminating private ownership. This system seeks to establish a classless society, where resources and wealth are distributed according to need rather than market forces.